Download IND231/IND236 - Mettler

B
Communications
B.1.
Serial Interface Parameters
This appendix covers
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Serial Interface Parameters
Demand Output Mode
Continuous Output Mode
CTPZ
The IND231/IND236 terminal supports one standard serial port and one optional
serial port. These are designated COM1 (standard port on the Main PCB) and
COM2 (optional).
COM1 provides an RS-232 interface only. The RS-232 interface is a three-wire
(TxD, RxD, and GND) with selectable XON-XOFF handshaking.
Standard Interface Command Set
(SICS) Protocol.
Optional COM2 provides RS-232 and RS-422/485 interfaces. The RS-232 interface
is a three-wire (TxD, RxD, and GND) with selectable XON-XOFF handshaking. The
RS-485 connection is a two-wire interface and supports multi-drop communication
with addressing. The port must be configured in setup for use as either RS-232 or RS-485 due to
the different operating requirements of the interfaces.
Character framing is programmable in the setup mode. Framing can be:
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1 start bit
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7 or 8 ASCII data bits (selectable)
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0 or 1 parity bit (selectable as none, even, or odd)
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1 stop bit
The baud rate can be configured from 1200 to 115.2K baud and a checksum character can also
be configured when using the continuous output string.
The IND231/IND236 terminal serial ports support the following functions:
B.2.
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Print output with CTPZ input
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Continuous output with CTPZ input
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SICS (level 0 and level 1)
Demand Output Mode
The print output mode transmits data only when the terminal receives a print request. Print requests
are sent to the IND231/IND236 terminal when:
30094013 | 00 | 08/2013
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The operator presses PRINT
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A discrete input configured as print is triggered
METTLER TOLEDO IND231/IND236 User's Guide
B-1